Parafoveal colour vision responses of four dichromats.
D000328:Adult; D003118:Color Perception; D003119:Color Perception Tests; D003117:Color Vision Defects; D003124:Colorimetry; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D010786:Photoreceptor Cells / Q000503:physiopathology*